# Fast AI vs Intermittent Fasting

The clearest difference is review sentiment: Intermittent Fasting at 50% against Fast AI's 7%. Intermittent Fasting also leads on rating (4.8 vs 4.3) and ratings volume (1K vs 120). Fast AI's advantage is device support (3 vs 1) and iOS requirement (14.0 vs 16.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Fast AI sells 5 in-app purchases, starting at $5.99 per 7 days and Intermittent Fasting sells 10 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Intermittent Fasting holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: Intermittent Fasting has 1K ratings behind it against 120, so its average is the more settled of the two. Written reviews point the same way: 7% of Fast AI's written reviews are positive against 50% of Intermittent Fasting's.

Both ship on a similar rhythm, roughly every 2 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | Fast AI | Intermittent Fasting |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (120 ratings)](https://appshunter.io/ios/app/fast-ai-intermittent-fasting/id1629661646/reviews) | **[4.8 (1K ratings)](https://appshunter.io/ios/app/intermittent-fasting-fastify/id1638123672/reviews)** |
| Number of ratings | 120 | **1K** |
| Positive reviews | 7.1% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free with in-app purchases | Freemium |
| Size | 101 MB | 54 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kiryl Salavei](https://appshunter.io/developer/1033680093) | [AirShape](https://appshunter.io/developer/1638120760) |

## What reviewers say

### Fast AI

[App page](https://appshunter.io/ios/app/fast-ai-intermittent-fasting/id1629661646)

This app helps users achieve weight loss and improve well-being through intermittent fasting. It provides tracking, scheduling, and detailed analytics to guide users through various fasting plans. The app aims to make fasting a natural and effective part of a healthy lifestyle.

**Highlights:** Intermittent fasting tracker, Weight monitoring, Fasting and food window notifications, Detailed analytics, Multiple fasting schemes (e.g., 16/8), Fasting schedule, Apple Health weight sync

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Simple intermittent fasting | $5.99 | per 7 days |
| Intermittent Fasting 1 Month | $12.99 | per month |
| Personal Fast Program 3 Month | $19.99 | per 3 months |
| Intermittent Fasting + Tracker | $35.99 | per year |
| Intermittent Fasting Annual | $49.99 | per year |


### Intermittent Fasting

[App page](https://appshunter.io/ios/app/intermittent-fasting-fastify/id1638123672)

Track your eating schedule, receive guidance, and enhance your daily fasting experience. Achieve your weight goals, improve health, and increase energy within a supportive community.

**Highlights:** Fasting schedule tracking, Personalized fasting plans, Health and energy boost tips, Weight loss guidance, Fasting community support, Beginner and experienced plans

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Monthly Fasting Subscription | $6.99 | per month |
| Monthly Fasting Subscription | $10.49 | per month |
| Monthly Fasting Subscription | $12.49 | per month |
| Intermittent Fasting Timer | $12.99 | per 3 months |
| Quarterly Fasting Subscription | $16.99 | per 3 months |
| The Fasting | $19.99 | per 3 months |
| App Intermittent Fasting | $29.99 | per year |
| Annually Fasting Subscription | $39.99 | per year |
| Annually Subscription | $59.99 | per year |

**What reviewers like**

- 👍 Great app design
- 🚀 Simple and easy to use
- 💡 Helpful for weight loss and fasting
- 🚀 Tracks fasting progress well

**What reviewers complain about**

- 🐛 App freezes on goals page
- 🐛 Help link crashes the app
- 🐛 Incomplete information display
- 🐛 UI issues with screen fitting
- 🐛 Inability to edit fasting logs

**Reported bugs**

- App freezes on goals page
- Help link crashes the app
- Incomplete information display
- UI issues with screen fitting
- Inability to edit fasting logs

**Requested features**

- Allow changing app icon color
- Add more diet and recipe tips
- Implement dark mode option
- Provide more detailed statistics


## Frequently asked questions

### Is Fast AI free?

Fast AI is free to download, with in-app purchases available.

### Is Intermittent Fasting free?

Intermittent Fasting is free to download, with in-app purchases available.

### Which has better reviews, Fast AI or Intermittent Fasting?

Intermittent Fasting is rated higher. Fast AI averages 4.3 out of 5 from 120 ratings, while Intermittent Fasting averages 4.8 from 1K ratings.

### Do Fast AI or Intermittent Fasting have ads?

Neither Fast AI nor Intermittent Fasting shows ads.

### Which is updated more often, Fast AI or Intermittent Fasting?

Fast AI ships an update every 2 weeks, and Intermittent Fasting every 2 weeks. Most recently, Fast AI was updated on November 3, 2026 and Intermittent Fasting on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*